This bulletin applies to BMW 3 Series sedans, 4 Series Coupe, 4 Series Convertible and Z4 Roadster vehicles, all produced from Nov. 5, 2018, to July 1, 2021.
Reprogram the vehicle using ISTA 4.30.21 to I level S18A-21-07-520 or later.
This bulletin applies to BMW 3 Series sedans, 4 Series Coupe, 4 Series Convertible and Z4 Roadster vehicles, all produced from Nov. 5, 2018, to July 1, 2021.
The yellow CCM, ID code 0042 (brake system), may light up when starting the vehicle. Avoid abrupt braking and drive at a moderate speed. Various fault patterns may occur depending on the time of occurrence. The parking brake will not work or cannot be released if it was in operation when the engine was started. Anti-lock braking function or other dynamic stability control functions may no longer be available. Fault code 48082F (internal control unit – read-only memory flash error) may be stored in the fault memory of the DSC control unit. After another terminal change, the CCM goes out.
The fault code is no longer entered. Repeating the DSC control unit self-test cures the fault. The fault is unlikely to occur again. The cause: unfavorable software in the DSC control unit.
Reprogram the vehicle using ISTA 4.30.21 to I level S18A-21-07-520 or later.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
